	XS	S	M	M	L	L	XL
Stack	553mm	567mm	576mm	576mm	600mm	600mm	614mm
Reach	375mm	385mm	400mm	400mm	415mm	415mm	430mm
Stack to Reach Ratio	1.47:1	1.47:1	1.44:1	1.44:1	1.45:1	1.45:1	1.43:1
Seat Tube Length, C-T	450mm	465mm	485mm	485mm	515mm	515mm	545mm
Seat Tube Length, Effective Unknown	73.5mm	73.5mm	73.5mm	—	73.5mm	—	73.5mm
Top Tube Length, Effective/Horizontal Center	541mm	555mm	573mm	—	594mm	—	613mm
Top Tube Length, Effective/Horizontal HT Top	—	—	—	573mm	—	594mm	—
Head Tube Angle	70deg	70deg	70deg	70deg	70deg	70deg	70deg
Effective Seat Tube Angle, Unknown	—	—	—	73.5deg	—	73.5deg	—
Head Tube Length	95mm	110mm	120mm	120mm	145mm	145mm	165mm
Bottom Bracket Drop	75mm	75mm	75mm	75mm	75mm	75mm	75mm
Bottom Bracket Height	291.9mm	291.9mm	291.9mm	291.9mm	291.9mm	291.9mm	291.9mm
Chainstay Length	435mm	435mm	435mm	435mm	435mm	435mm	435mm
Chainstay Length Horizontal	428.5mm	428.5mm	428.5mm	428.5mm	428.5mm	428.5mm	428.5mm
Front-Center	606mm	619.5mm	637mm	637mm	660mm	660mm	680mm
Front-Center Horizontal	599.5mm	614.5mm	632.5mm	632.5mm	655.5mm	655.5mm	675.5mm
Wheelbase	1028mm	1043mm	1061mm	1061mm	1084mm	1084mm	1104mm
Fork Offset/Rake	47.5mm	47.4mm	47.1mm	47mm	46.5mm	47mm	46.4mm
Fork Length (Axle-To-Crown)	420mm	420mm	420mm	420mm	420mm	420mm	420mm
Trail	83mm very high	83.1mm very high	83.4mm very high	83.5mm very high	84.1mm very high	83.5mm very high	84.2mm very high
Mechanical Trail	78mm	78.1mm	78.3mm	78.5mm	79mm	78.5mm	79.1mm
Wheel Flop	26.7mm	26.7mm	26.8mm	26.8mm	27mm	26.8mm	27.1mm
Standover Height	758mm	772mm	787mm	787mm	813mm	813mm	834mm
Tire to Pedal Spindle	69.1mm 170 mm cranks	82.6mm 170 mm cranks	100.1mm 170 mm cranks	100.1mm 170 mm cranks	123.1mm 170 mm cranks	123.1mm 170 mm cranks	143.1mm 170 mm cranks
Pedal Spindle to Ground Clearance	121.9mm 170 mm cranks	121.9mm 170 mm cranks	121.9mm 170 mm cranks	121.9mm 170 mm cranks	121.9mm 170 mm cranks	121.9mm 170 mm cranks	121.9mm 170 mm cranks

	XS	S	M	M	L	L	XL
Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	2.2in	2.2in	2.2in	2.2in	2.2in	2.2in	2.2in
Tire Width Max	—	—	—	2.2in	—	2.2in	—
Tire Outer Diameter	733.8mm	733.8mm	733.8mm	733.8mm	733.8mm	733.8mm	733.8mm
Bike Length with Tires	1761.8mm	1776.8mm	1794.8mm	1794.8mm	1817.8mm	1817.8mm	1837.8mm

Very Upright

Somewhat Upright

Average

Somewhat Aggressive

Very Aggressive

The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.

Learn more about the Upright/Aggressive Scale

Category Trend

Progressive Gravel

Source:reebcycles.com, n/a

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2025 REEB Cycles The Sam's Pants Base 2025

Geometry

Base 2025 Build

Stack and Reach vs. Category Trend